Proper because improper would be 6 over 5 and mixes would be 1 and 1 over 6
The answer is 1,230. All you have to do is add everything on the right side you don’t have to worry about anything on the left.
To simplify the expression it would be
(10 + 9) x (3 - 1) x 2 = +75
19 x 2 x 2
76
76 > 75